Tom, you haven't listed your experience and qualifications so don't take offense if I say some things you already know.

If you are thinking about shocking to help you eliminate fish, I think you will be disappointed. It is more of a sampling tool. As an analysis tool, it is OK if the boat is run by a seasoned pro who can extrapolate and do a complete and thorough analysis.

It is my personal belief that you can pretty well analyze from creel surveys.